-// Copyright (C) 2007-2008 CEA/DEN, EDF R&D, OPEN CASCADE
+// Copyright (C) 2007-2016 CEA/DEN, EDF R&D, OPEN CASCADE
//
-// Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
-// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
//
-// This library is free software; you can redistribute it and/or
-// modify it under the terms of the GNU Lesser General Public
-// License as published by the Free Software Foundation; either
-// version 2.1 of the License.
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+// Lesser General Public License for more details.
//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-// Lesser General Public License for more details.
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
-// You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-//
-// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
+// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
+
// File : NETGENPlugin_NETGEN_2D_ONLY.cxx
// Author : Edward AGAPOV (OCC)
// Project : SALOME
#include "NETGENPlugin_NETGEN_2D_ONLY.hxx"
#include "NETGENPlugin_Mesher.hxx"
-
-#include "SMDS_MeshElement.hxx"
-#include "SMDS_MeshNode.hxx"
-#include "SMESHDS_Mesh.hxx"
-#include "SMESH_Comment.hxx"
-#include "SMESH_Gen.hxx"
-#include "SMESH_Mesh.hxx"
-#include "SMESH_MesherHelper.hxx"
-#include "StdMeshers_FaceSide.hxx"
-#include "StdMeshers_MaxElementArea.hxx"
-#include "StdMeshers_LengthFromEdges.hxx"
-#include "StdMeshers_QuadranglePreference.hxx"
-
+#include "NETGENPlugin_Hypothesis_2D.hxx"
+
+#include <SMDS_MeshElement.hxx>
+#include <SMDS_MeshNode.hxx>
+#include <SMESHDS_Mesh.hxx>
+#include <SMESH_Comment.hxx>
+#include <SMESH_Gen.hxx>
+#include <SMESH_Mesh.hxx>
+#include <SMESH_MesherHelper.hxx>
+#include <SMESH_subMesh.hxx>
+#include <StdMeshers_FaceSide.hxx>
+#include <StdMeshers_LengthFromEdges.hxx>
+#include <StdMeshers_MaxElementArea.hxx>
+#include <StdMeshers_QuadranglePreference.hxx>
+#include <StdMeshers_ViscousLayers2D.hxx>
+
+#include <Precision.hxx>
#include <Standard_ErrorHandler.hxx>
#include <Standard_Failure.hxx>
-#include "utilities.h"
+#include <utilities.h>
#include <list>
#include <vector>
+#include <limits>
/*
Netgen include files
namespace nglib {
#include <nglib.h>
}
+#ifndef OCCGEOMETRY
#define OCCGEOMETRY
+#endif
#include <occgeom.hpp>
#include <meshing.hpp>
//#include <meshtype.hpp>
namespace netgen {
+#ifdef NETGEN_V5
+ extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, MeshingParameters&, int, int);
+#else
extern int OCCGenerateMesh (OCCGeometry&, Mesh*&, int, int, char*);
- /*extern*/ MeshingParameters mparam;
+#endif
+ extern MeshingParameters mparam;
+ extern void OCCSetLocalMeshSize(OCCGeometry & geom, Mesh & mesh);
}
using namespace std;
*/
//=============================================================================
-NETGENPlugin_NETGEN_2D_ONLY::NETGENPlugin_NETGEN_2D_ONLY(int hypId, int studyId,
+NETGENPlugin_NETGEN_2D_ONLY::NETGENPlugin_NETGEN_2D_ONLY(int hypId,
+ int studyId,
SMESH_Gen* gen)
: SMESH_2D_Algo(hypId, studyId, gen)
{
- MESSAGE("NETGENPlugin_NETGEN_2D_ONLY::NETGENPlugin_NETGEN_2D_ONLY");
_name = "NETGEN_2D_ONLY";
-
+
_shapeType = (1 << TopAbs_FACE);// 1 bit /shape type
+ _onlyUnaryInput = false; // treat all FACEs at once
_compatibleHypothesis.push_back("MaxElementArea");
_compatibleHypothesis.push_back("LengthFromEdges");
_compatibleHypothesis.push_back("QuadranglePreference");
+ _compatibleHypothesis.push_back("NETGEN_Parameters_2D");
+ _compatibleHypothesis.push_back("ViscousLayers2D");
- _hypMaxElementArea = 0;
- _hypLengthFromEdges = 0;
+ _hypMaxElementArea = 0;
+ _hypLengthFromEdges = 0;
_hypQuadranglePreference = 0;
+ _hypParameters = 0;
}
//=============================================================================
_hypMaxElementArea = 0;
_hypLengthFromEdges = 0;
_hypQuadranglePreference = 0;
+ _hypParameters = 0;
+ _progressByTic = -1;
const list<const SMESHDS_Hypothesis*>& hyps = GetUsedHypothesis(aMesh, aShape, false);
aStatus = HYP_MISSING;
+ bool hasVL = false;
list<const SMESHDS_Hypothesis*>::const_iterator ith;
for (ith = hyps.begin(); ith != hyps.end(); ++ith )
{
_hypLengthFromEdges = static_cast<const StdMeshers_LengthFromEdges*> (hyp);
else if ( hypName == "QuadranglePreference" )
_hypQuadranglePreference = static_cast<const StdMeshers_QuadranglePreference*>(hyp);
+ else if ( hypName == "NETGEN_Parameters_2D" )
+ _hypParameters = static_cast<const NETGENPlugin_Hypothesis_2D*>(hyp);
+ else if ( hypName == StdMeshers_ViscousLayers2D::GetHypType() )
+ hasVL = true;
else {
aStatus = HYP_INCOMPATIBLE;
return false;
}
}
- if ( _hypMaxElementArea && _hypLengthFromEdges ) {
+ int nbHyps = bool(_hypMaxElementArea) + bool(_hypLengthFromEdges) + bool(_hypParameters );
+ if ( nbHyps > 1 )
aStatus = HYP_CONCURENT;
- return false;
- }
-
- if ( _hypMaxElementArea || _hypLengthFromEdges )
+ else if ( hasVL )
+ error( StdMeshers_ViscousLayers2D::CheckHypothesis( aMesh, aShape, aStatus ));
+ else
aStatus = HYP_OK;
- return aStatus == HYP_OK;
+ if ( aStatus == HYP_OK && _hypParameters && _hypQuadranglePreference )
+ {
+ aStatus = HYP_INCOMPAT_HYPS;
+ return error(SMESH_Comment("\"") << _hypQuadranglePreference->GetName()
+ << "\" and \"" << _hypParameters->GetName()
+ << "\" are incompatible hypotheses");
+ }
+
+ return ( aStatus == HYP_OK );
}
-//================================================================================
+// namespace
+// {
+// void limitSize( netgen::Mesh* ngMesh,
+// const double maxh )
+// {
+// // get bnd box
+// netgen::Point3d pmin, pmax;
+// ngMesh->GetBox( pmin, pmax, 0 );
+// const double dx = pmax.X() - pmin.X();
+// const double dy = pmax.Y() - pmin.Y();
+// const double dz = pmax.Z() - pmin.Z();
+
+// const int nbX = Max( 2, int( dx / maxh * 3 ));
+// const int nbY = Max( 2, int( dy / maxh * 3 ));
+// const int nbZ = Max( 2, int( dz / maxh * 3 ));
+
+// if ( ! & ngMesh->LocalHFunction() )
+// ngMesh->SetLocalH( pmin, pmax, 0.1 );
+
+// netgen::Point3d p;
+// for ( int i = 0; i <= nbX; ++i )
+// {
+// p.X() = pmin.X() + i * dx / nbX;
+// for ( int j = 0; j <= nbY; ++j )
+// {
+// p.Y() = pmin.Y() + j * dy / nbY;
+// for ( int k = 0; k <= nbZ; ++k )
+// {
+// p.Z() = pmin.Z() + k * dz / nbZ;
+// ngMesh->RestrictLocalH( p, maxh );
+// }
+// }
+// }
+// }
+// }
+
+//=============================================================================
/*!
- * \brief Fill netgen mesh with segments
- * \retval SMESH_ComputeErrorPtr - error description
+ *Here we are going to use the NETGEN mesher
*/
-//================================================================================
+//=============================================================================
-static TError AddSegmentsToMesh(netgen::Mesh& ngMesh,
- OCCGeometry& geom,
- const TSideVector& wires,
- SMESH_MesherHelper& helper,
- vector< const SMDS_MeshNode* > & nodeVec)
+bool NETGENPlugin_NETGEN_2D_ONLY::Compute(SMESH_Mesh& aMesh,
+ const TopoDS_Shape& aShape)
{
- // ----------------------------
- // Check wires and count nodes
- // ----------------------------
- int nbNodes = 0;
- for ( int iW = 0; iW < wires.size(); ++iW )
+ netgen::multithread.terminate = 0;
+ //netgen::multithread.task = "Surface meshing";
+
+ SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
+ SMESH_MesherHelper helper(aMesh);
+ helper.SetElementsOnShape( true );
+
+ NETGENPlugin_NetgenLibWrapper ngLib;
+ ngLib._isComputeOk = false;
+
+ netgen::Mesh ngMeshNoLocSize;
+ netgen::Mesh * ngMeshes[2] = { (netgen::Mesh*) ngLib._ngMesh, & ngMeshNoLocSize };
+ netgen::OCCGeometry occgeoComm;
+
+ // min / max sizes are set as follows:
+ // if ( _hypParameters )
+ // min and max are defined by the user
+ // else if ( _hypLengthFromEdges )
+ // min = aMesher.GetDefaultMinSize()
+ // max = average segment len of a FACE
+ // else if ( _hypMaxElementArea )
+ // min = aMesher.GetDefaultMinSize()
+ // max = f( _hypMaxElementArea )
+ // else
+ // min = aMesher.GetDefaultMinSize()
+ // max = max segment len of a FACE
+
+ NETGENPlugin_Mesher aMesher( &aMesh, aShape, /*isVolume=*/false);
+ aMesher.SetParameters( _hypParameters ); // _hypParameters -> netgen::mparam
+ const bool toOptimize = _hypParameters ? _hypParameters->GetOptimize() : true;
+ if ( _hypMaxElementArea )
{
- StdMeshers_FaceSidePtr wire = wires[ iW ];
- if ( wire->MissVertexNode() )
- return TError
- (new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH, "Missing nodes on vertices"));
-
- const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
- if ( uvPtVec.size() != wire->NbPoints() )
- return TError
- (new SMESH_ComputeError(COMPERR_BAD_INPUT_MESH,
- SMESH_Comment("Unexpected nb of points on wire ") << iW
- << ": " << uvPtVec.size()<<" != "<<wire->NbPoints()));
- nbNodes += wire->NbSegments();
+ netgen::mparam.maxh = sqrt( 2. * _hypMaxElementArea->GetMaxArea() / sqrt(3.0) );
}
- nodeVec.reserve( nbNodes );
+ if ( _hypQuadranglePreference )
+ netgen::mparam.quad = true;
+
+ // local size is common for all FACEs in aShape?
+ const bool isCommonLocalSize = ( !_hypLengthFromEdges && !_hypMaxElementArea && netgen::mparam.uselocalh );
+ const bool isDefaultHyp = ( !_hypLengthFromEdges && !_hypMaxElementArea && !_hypParameters );
+
+ if ( isCommonLocalSize ) // compute common local size in ngMeshes[0]
+ {
+ //list< SMESH_subMesh* > meshedSM[4]; --> all sub-shapes are added to occgeoComm
+ aMesher.PrepareOCCgeometry( occgeoComm, aShape, aMesh );//, meshedSM );
+
+ // local size set at MESHCONST_ANALYSE step depends on
+ // minh, face_maxh, grading and curvaturesafety; find minh if not set by the user
+ if ( !_hypParameters || netgen::mparam.minh < DBL_MIN )
+ {
+ if ( !_hypParameters )
+ netgen::mparam.maxh = occgeoComm.GetBoundingBox().Diam() / 3.;
+ netgen::mparam.minh = aMesher.GetDefaultMinSize( aShape, netgen::mparam.maxh );
+ }
+ // set local size depending on curvature and NOT closeness of EDGEs
+ netgen::occparam.resthcloseedgeenable = false;
+ //netgen::occparam.resthcloseedgefac = 1.0 + netgen::mparam.grading;
+ occgeoComm.face_maxh = netgen::mparam.maxh;
+ netgen::OCCSetLocalMeshSize( occgeoComm, *ngMeshes[0] );
+ occgeoComm.emap.Clear();
+ occgeoComm.vmap.Clear();
+
+ // set local size according to size of existing segments
+ const double factor = netgen::occparam.resthcloseedgefac;
+ TopTools_IndexedMapOfShape edgeMap;
+ TopExp::MapShapes( aMesh.GetShapeToMesh(), TopAbs_EDGE, edgeMap );
+ for ( int iE = 1; iE <= edgeMap.Extent(); ++iE )
+ {
+ const TopoDS_Shape& edge = edgeMap( iE );
+ if ( SMESH_Algo::isDegenerated( TopoDS::Edge( edge )))
+ continue;
+ SMESHDS_SubMesh* smDS = meshDS->MeshElements( edge );
+ if ( !smDS ) continue;
+ SMDS_ElemIteratorPtr segIt = smDS->GetElements();
+ while ( segIt->more() )
+ {
+ const SMDS_MeshElement* seg = segIt->next();
+ SMESH_TNodeXYZ n1 = seg->GetNode(0);
+ SMESH_TNodeXYZ n2 = seg->GetNode(1);
+ gp_XYZ p = 0.5 * ( n1 + n2 );
+ netgen::Point3d pi(p.X(), p.Y(), p.Z());
+ ngMeshes[0]->RestrictLocalH( pi, factor * ( n1 - n2 ).Modulus() );
+ }
+ }
- // -----------------
- // Fill netgen mesh
- // -----------------
+ // set local size defined on shapes
+ aMesher.SetLocalSize( occgeoComm, *ngMeshes[0] );
+ try {
+ ngMeshes[0]->LoadLocalMeshSize( mparam.meshsizefilename );
+ } catch (NgException & ex) {
+ return error( COMPERR_BAD_PARMETERS, ex.What() );
+ }
+ }
+ netgen::mparam.uselocalh = toOptimize; // restore as it is used at surface optimization
-// netgen::Box<3> bb = geom.GetBoundingBox();
-// bb.Increase (bb.Diam()/10);
-// ngMesh.SetLocalH (bb.PMin(), bb.PMax(), 0.5); // set grading
+ // ==================
+ // Loop on all FACEs
+ // ==================
- const int faceID = 1, solidID = 0;
- ngMesh.AddFaceDescriptor (FaceDescriptor(faceID, solidID, solidID, 0));
+ vector< const SMDS_MeshNode* > nodeVec;
- for ( int iW = 0; iW < wires.size(); ++iW )
+ TopExp_Explorer fExp( aShape, TopAbs_FACE );
+ for ( int iF = 0; fExp.More(); fExp.Next(), ++iF )
{
- StdMeshers_FaceSidePtr wire = wires[ iW ];
- const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
+ TopoDS_Face F = TopoDS::Face( fExp.Current() /*.Oriented( TopAbs_FORWARD )*/);
+ int faceID = meshDS->ShapeToIndex( F );
+ SMESH_ComputeErrorPtr& faceErr = aMesh.GetSubMesh( F )->GetComputeError();
+
+ _quadraticMesh = helper.IsQuadraticSubMesh( F );
+ const bool ignoreMediumNodes = _quadraticMesh;
+
+ // build viscous layers if required
+ if ( F.Orientation() != TopAbs_FORWARD &&
+ F.Orientation() != TopAbs_REVERSED )
+ F.Orientation( TopAbs_FORWARD ); // avoid pb with TopAbs_INTERNAL
+ SMESH_ProxyMesh::Ptr proxyMesh = StdMeshers_ViscousLayers2D::Compute( aMesh, F );
+ if ( !proxyMesh )
+ continue;
+
+ // ------------------------
+ // get all EDGEs of a FACE
+ // ------------------------
+ TSideVector wires =
+ StdMeshers_FaceSide::GetFaceWires( F, aMesh, ignoreMediumNodes, faceErr, proxyMesh );
+ if ( faceErr && !faceErr->IsOK() )
+ continue;
+ int nbWires = wires.size();
+ if ( nbWires == 0 )
+ {
+ faceErr.reset
+ ( new SMESH_ComputeError
+ ( COMPERR_ALGO_FAILED, "Problem in StdMeshers_FaceSide::GetFaceWires()" ));
+ continue;
+ }
+ if ( wires[0]->NbSegments() < 3 ) // ex: a circle with 2 segments
+ {
+ faceErr.reset
+ ( new SMESH_ComputeError
+ ( COMPERR_BAD_INPUT_MESH, SMESH_Comment("Too few segments: ")<<wires[0]->NbSegments()) );
+ continue;
+ }
+
+ // ----------------------
+ // compute maxh of a FACE
+ // ----------------------
+
+ if ( !_hypParameters )
+ {
+ double edgeLength = 0;
+ if (_hypLengthFromEdges )
+ {
+ // compute edgeLength as an average segment length
+ int nbSegments = 0;
+ for ( int iW = 0; iW < nbWires; ++iW )
+ {
+ edgeLength += wires[ iW ]->Length();
+ nbSegments += wires[ iW ]->NbSegments();
+ }
+ if ( nbSegments )
+ edgeLength /= nbSegments;
+ netgen::mparam.maxh = edgeLength;
+ }
+ else if ( isDefaultHyp )
+ {
+ // set edgeLength by a longest segment
+ double maxSeg2 = 0;
+ for ( int iW = 0; iW < nbWires; ++iW )
+ {
+ const UVPtStructVec& points = wires[ iW ]->GetUVPtStruct();
+ if ( points.empty() )
+ return error( COMPERR_BAD_INPUT_MESH );
+ gp_Pnt pPrev = SMESH_TNodeXYZ( points[0].node );
+ for ( size_t i = 1; i < points.size(); ++i )
+ {
+ gp_Pnt p = SMESH_TNodeXYZ( points[i].node );
+ maxSeg2 = Max( maxSeg2, p.SquareDistance( pPrev ));
+ pPrev = p;
+ }
+ }
+ edgeLength = sqrt( maxSeg2 ) * 1.05;
+ netgen::mparam.maxh = edgeLength;
+ }
+ if ( netgen::mparam.maxh < DBL_MIN )
+ netgen::mparam.maxh = occgeoComm.GetBoundingBox().Diam();
+
+ if ( !isCommonLocalSize )
+ {
+ netgen::mparam.minh = aMesher.GetDefaultMinSize( F, netgen::mparam.maxh );
+ }
+ }
- int firstPointID = ngMesh.GetNP() + 1;
- int edgeID = 1, posID = -2;
- for ( int i = 0; i < wire->NbSegments(); ++i ) // loop on segments
+ // prepare occgeom
+ netgen::OCCGeometry occgeom;
+ occgeom.shape = F;
+ occgeom.fmap.Add( F );
+ occgeom.CalcBoundingBox();
+ occgeom.facemeshstatus.SetSize(1);
+ occgeom.facemeshstatus = 0;
+ occgeom.face_maxh_modified.SetSize(1);
+ occgeom.face_maxh_modified = 0;
+ occgeom.face_maxh.SetSize(1);
+ occgeom.face_maxh = netgen::mparam.maxh;
+
+ // -------------------------
+ // Fill netgen mesh
+ // -------------------------
+
+ // MESHCONST_ANALYSE step may lead to a failure, so we make an attempt
+ // w/o MESHCONST_ANALYSE at the second loop
+ int err = 0;
+ enum { LOC_SIZE, NO_LOC_SIZE };
+ int iLoop = isCommonLocalSize ? 0 : 1;
+ for ( ; iLoop < 2; iLoop++ )
{
- // Add the first point of a segment
- const SMDS_MeshNode * n = uvPtVec[ i ].node;
- const int posShapeID = n->GetPosition()->GetShapeId();
+ //bool isMESHCONST_ANALYSE = false;
+ InitComputeError();
- // skip nodes on degenerated edges
- if ( helper.IsDegenShape( posShapeID ) &&
- helper.IsDegenShape( uvPtVec[ i+1 ].node->GetPosition()->GetShapeId() ))
- continue;
+ netgen::Mesh * ngMesh = ngMeshes[ iLoop ];
+ ngMesh->DeleteMesh();
+
+ if ( iLoop == NO_LOC_SIZE )
+ {
+ ngMesh->SetGlobalH ( mparam.maxh );
+ ngMesh->SetMinimalH( mparam.minh );
+ Box<3> bb = occgeom.GetBoundingBox();
+ bb.Increase (bb.Diam()/10);
+ ngMesh->SetLocalH (bb.PMin(), bb.PMax(), mparam.grading);
+ aMesher.SetLocalSize( occgeom, *ngMesh );
+ try {
+ ngMesh->LoadLocalMeshSize( mparam.meshsizefilename );
+ } catch (NgException & ex) {
+ return error( COMPERR_BAD_PARMETERS, ex.What() );
+ }
+ }
- nodeVec.push_back( n );
+ nodeVec.clear();
+ faceErr = aMesher.AddSegmentsToMesh( *ngMesh, occgeom, wires, helper, nodeVec,
+ /*overrideMinH=*/!_hypParameters);
+ if ( faceErr && !faceErr->IsOK() )
+ break;
- MeshPoint mp( Point<3> (n->X(), n->Y(), n->Z()) );
- ngMesh.AddPoint ( mp, 1, EDGEPOINT );
+ //if ( !isCommonLocalSize )
+ //limitSize( ngMesh, mparam.maxh * 0.8);
- // Add the segment
- Segment seg;
+ // -------------------------
+ // Generate surface mesh
+ // -------------------------
- seg.p1 = ngMesh.GetNP(); // ng node id
- seg.p2 = seg.p1 + 1; // ng node id
- seg.edgenr = ngMesh.GetNSeg() + 1;// segment id
- seg.si = faceID; // = geom.fmap.FindIndex (face);
+ const int startWith = MESHCONST_MESHSURFACE;
+ const int endWith = toOptimize ? MESHCONST_OPTSURFACE : MESHCONST_MESHSURFACE;
- for ( int iEnd = 0; iEnd < 2; ++iEnd)
+ SMESH_Comment str;
+ try {
+ OCC_CATCH_SIGNALS;
+
+#ifdef NETGEN_V5
+ err = netgen::OCCGenerateMesh(occgeom, ngMesh, netgen::mparam, startWith, endWith);
+#else
+ char *optstr = 0;
+ err = netgen::OCCGenerateMesh(occgeom, ngMesh, startWith, endWith, optstr);
+#endif
+ if ( netgen::multithread.terminate )
+ return false;
+ if ( err )
+ str << "Error in netgen::OCCGenerateMesh() at " << netgen::multithread.task;
+ }
+ catch (Standard_Failure& ex)
+ {
+ err = 1;
+ str << "Exception in netgen::OCCGenerateMesh()"
+ << " at " << netgen::multithread.task
+ << ": " << ex.DynamicType()->Name();
+ if ( ex.GetMessageString() && strlen( ex.GetMessageString() ))
+ str << ": " << ex.GetMessageString();
+ }
+ catch (...) {
+ err = 1;
+ str << "Exception in netgen::OCCGenerateMesh()"
+ << " at " << netgen::multithread.task;
+ }
+ if ( err )
{
- const UVPtStruct& pnt = uvPtVec[ i + iEnd ];
+ if ( aMesher.FixFaceMesh( occgeom, *ngMesh, 1 ))
+ break;
+ if ( iLoop == LOC_SIZE )
+ {
+ netgen::mparam.minh = netgen::mparam.maxh;
+ netgen::mparam.maxh = 0;
+ for ( size_t iW = 0; iW < wires.size(); ++iW )
+ {
+ StdMeshers_FaceSidePtr wire = wires[ iW ];
+ const vector<UVPtStruct>& uvPtVec = wire->GetUVPtStruct();
+ for ( size_t iP = 1; iP < uvPtVec.size(); ++iP )
+ {
+ SMESH_TNodeXYZ p( uvPtVec[ iP ].node );
+ netgen::Point3d np( p.X(),p.Y(),p.Z());
+ double segLen = p.Distance( uvPtVec[ iP-1 ].node );
+ double size = ngMesh->GetH( np );
+ netgen::mparam.minh = Min( netgen::mparam.minh, size );
+ netgen::mparam.maxh = Max( netgen::mparam.maxh, segLen );
+ }
+ }
+ //cerr << "min " << netgen::mparam.minh << " max " << netgen::mparam.maxh << endl;
+ netgen::mparam.minh *= 0.9;
+ netgen::mparam.maxh *= 1.1;
+ continue;
+ }
+ else
+ {
+ faceErr.reset( new SMESH_ComputeError( COMPERR_ALGO_FAILED, str ));
+ }
+ }
+
+
+ // ----------------------------------------------------
+ // Fill the SMESHDS with the generated nodes and faces
+ // ----------------------------------------------------
- seg.epgeominfo[ iEnd ].dist = pnt.param; // param on curve
- seg.epgeominfo[ iEnd ].u = pnt.u;
- seg.epgeominfo[ iEnd ].v = pnt.v;
+ int nbNodes = ngMesh->GetNP();
+ int nbFaces = ngMesh->GetNSE();
- // find out edge id and node parameter on edge
- bool onVertex = ( pnt.node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX );
- if ( onVertex || posShapeID != posID )
+ int nbInputNodes = nodeVec.size()-1;
+ nodeVec.resize( nbNodes+1, 0 );
+
+ // add nodes
+ for ( int ngID = nbInputNodes + 1; ngID <= nbNodes; ++ngID )
+ {
+ const MeshPoint& ngPoint = ngMesh->Point( ngID );
+ SMDS_MeshNode * node = meshDS->AddNode(ngPoint(0), ngPoint(1), ngPoint(2));
+ nodeVec[ ngID ] = node;
+ }
+
+ // create faces
+ int i,j;
+ vector<const SMDS_MeshNode*> nodes;
+ for ( i = 1; i <= nbFaces ; ++i )
+ {
+ const Element2d& elem = ngMesh->SurfaceElement(i);
+ nodes.resize( elem.GetNP() );
+ for (j=1; j <= elem.GetNP(); ++j)
{
- // get edge id
- double normParam = pnt.normParam;
- if ( onVertex )
- normParam = 0.5 * ( uvPtVec[ i ].normParam + uvPtVec[ i+1 ].normParam );
- const TopoDS_Edge& edge = wire->Edge( wire->EdgeIndex( normParam ));
- edgeID = geom.emap.FindIndex( edge );
- posID = posShapeID;
- if ( onVertex ) // param on curve is different on each of two edges
- seg.epgeominfo[ iEnd ].dist = helper.GetNodeU( edge, pnt.node );
+ int pind = elem.PNum(j);
+ if ( pind < 1 )
+ break;
+ nodes[ j-1 ] = nodeVec[ pind ];
+ if ( nodes[ j-1 ]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
+ {
+ const PointGeomInfo& pgi = elem.GeomInfoPi(j);
+ meshDS->SetNodeOnFace( nodes[ j-1 ], faceID, pgi.u, pgi.v);
+ }
+ }
+ if ( j > elem.GetNP() )
+ {
+ if ( elem.GetType() == TRIG )
+ helper.AddFace(nodes[0],nodes[1],nodes[2]);
+ else
+ helper.AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
}
- seg.epgeominfo[ iEnd ].edgenr = edgeID; // = geom.emap.FindIndex(edge);
}
- ngMesh.AddSegment (seg);
-
-// cout << "Segment: " << seg.edgenr << endl
-// << "\tp1: " << seg.p1 << endl
-// << "\tp2: " << seg.p2 << endl
-// << "\tp0 param: " << seg.epgeominfo[ 0 ].dist << endl
-// << "\tp0 uv: " << seg.epgeominfo[ 0 ].u <<", "<< seg.epgeominfo[ 0 ].v << endl
-// << "\tp0 edge: " << seg.epgeominfo[ 0 ].edgenr << endl
-// << "\tp1 param: " << seg.epgeominfo[ 1 ].dist << endl
-// << "\tp1 uv: " << seg.epgeominfo[ 1 ].u <<", "<< seg.epgeominfo[ 1 ].v << endl
-// << "\tp1 edge: " << seg.epgeominfo[ 1 ].edgenr << endl;
- }
- Segment& seg = ngMesh.LineSegment( ngMesh.GetNSeg() );
- seg.p2 = firstPointID;
- }
+ break;
+ } // two attempts
+ } // loop on FACEs
- ngMesh.CalcSurfacesOfNode();
+ return true;
+}
- return TError();
+void NETGENPlugin_NETGEN_2D_ONLY::CancelCompute()
+{
+ SMESH_Algo::CancelCompute();
+ netgen::multithread.terminate = 1;
}
-//=============================================================================
+//================================================================================
/*!
- *Here we are going to use the NETGEN mesher
+ * \brief Return progress of Compute() [0.,1]
*/
-//=============================================================================
+//================================================================================
-bool NETGENPlugin_NETGEN_2D_ONLY::Compute(SMESH_Mesh& aMesh,
- const TopoDS_Shape& aShape)
+double NETGENPlugin_NETGEN_2D_ONLY::GetProgress() const
{
- MESSAGE("NETGENPlugin_NETGEN_2D_ONLY::Compute()");
+ return -1;
+ // const char* task1 = "Surface meshing";
+ // //const char* task2 = "Optimizing surface";
+ // double& progress = const_cast<NETGENPlugin_NETGEN_2D_ONLY*>( this )->_progress;
+ // if ( _progressByTic < 0. &&
+ // strncmp( netgen::multithread.task, task1, 3 ) == 0 )
+ // {
+ // progress = Min( 0.25, SMESH_Algo::GetProgressByTic() ); // [0, 0.25]
+ // }
+ // else //if ( strncmp( netgen::multithread.task, task2, 3 ) == 0)
+ // {
+ // if ( _progressByTic < 0 )
+ // {
+ // NETGENPlugin_NETGEN_2D_ONLY* me = (NETGENPlugin_NETGEN_2D_ONLY*) this;
+ // me->_progressByTic = 0.25 / (_progressTic+1);
+ // }
+ // const_cast<NETGENPlugin_NETGEN_2D_ONLY*>( this )->_progressTic++;
+ // progress = Max( progress, _progressByTic * _progressTic );
+ // }
+ // //cout << netgen::multithread.task << " " << _progressTic << endl;
+ // return Min( progress, 0.99 );
+}
- SMESHDS_Mesh* meshDS = aMesh.GetMeshDS();
- int faceID = meshDS->ShapeToIndex( aShape );
+//=============================================================================
+/*!
+ *
+ */
+//=============================================================================
- SMESH_MesherHelper helper(aMesh);
- _quadraticMesh = helper.IsQuadraticSubMesh(aShape);
- helper.SetElementsOnShape( true );
- const bool ignoreMediumNodes = _quadraticMesh;
-
- // ------------------------
- // get all edges of a face
- // ------------------------
- const TopoDS_Face F = TopoDS::Face( aShape.Oriented( TopAbs_FORWARD ));
- TError problem;
- TSideVector wires = StdMeshers_FaceSide::GetFaceWires( F, aMesh, ignoreMediumNodes, problem );
- if ( problem && !problem->IsOK() )
- return error( problem );
- int nbWires = wires.size();
- if ( nbWires == 0 )
- return error( "Problem in StdMeshers_FaceSide::GetFaceWires()");
- if ( wires[0]->NbSegments() < 3 ) // ex: a circle with 2 segments
- return error(COMPERR_BAD_INPUT_MESH,
- SMESH_Comment("Too few segments: ")<<wires[0]->NbSegments());
-
- // -------------------------
- // Make input netgen mesh
- // -------------------------
-
- Ng_Init();
- netgen::Mesh * ngMesh = new netgen::Mesh ();
-
- netgen::OCCGeometry occgeo;
- NETGENPlugin_Mesher::PrepareOCCgeometry( occgeo, F, aMesh );
- occgeo.fmap.Clear(); // face can be reversed, which is wrong in this case (issue 19978)
- occgeo.fmap.Add( F );
+bool NETGENPlugin_NETGEN_2D_ONLY::Evaluate(SMESH_Mesh& aMesh,
+ const TopoDS_Shape& aShape,
+ MapShapeNbElems& aResMap)
+{
+ TopoDS_Face F = TopoDS::Face(aShape);
+ if(F.IsNull())
+ return false;
- vector< const SMDS_MeshNode* > nodeVec;
- problem = AddSegmentsToMesh( *ngMesh, occgeo, wires, helper, nodeVec );
- if ( problem && !problem->IsOK() ) {
- delete ngMesh; Ng_Exit();
- return error( problem );
+ // collect info from edges
+ int nb0d = 0, nb1d = 0;
+ bool IsQuadratic = false;
+ bool IsFirst = true;
+ double fullLen = 0.0;
+ TopTools_MapOfShape tmpMap;
+ for (TopExp_Explorer exp(F, TopAbs_EDGE); exp.More(); exp.Next()) {
+ TopoDS_Edge E = TopoDS::Edge(exp.Current());
+ if( tmpMap.Contains(E) )
+ continue;
+ tmpMap.Add(E);
+ SMESH_subMesh *aSubMesh = aMesh.GetSubMesh(exp.Current());
+ MapShapeNbElemsItr anIt = aResMap.find(aSubMesh);
+ if( anIt==aResMap.end() ) {
+ SMESH_subMesh *sm = aMesh.GetSubMesh(F);
+ SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
+ smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated",this));
+ return false;
+ }
+ std::vector<int> aVec = (*anIt).second;
+ nb0d += aVec[SMDSEntity_Node];
+ nb1d += Max(aVec[SMDSEntity_Edge],aVec[SMDSEntity_Quad_Edge]);
+ double aLen = SMESH_Algo::EdgeLength(E);
+ fullLen += aLen;
+ if(IsFirst) {
+ IsQuadratic = (aVec[SMDSEntity_Quad_Edge] > aVec[SMDSEntity_Edge]);
+ IsFirst = false;
+ }
}
+ tmpMap.Clear();
- // --------------------
// compute edge length
- // --------------------
-
- double edgeLength = 0;
- if (_hypLengthFromEdges || !_hypLengthFromEdges && !_hypMaxElementArea)
- {
- int nbSegments = 0;
- for ( int iW = 0; iW < nbWires; ++iW )
- {
- edgeLength += wires[ iW ]->Length();
- nbSegments += wires[ iW ]->NbSegments();
- }
- if ( nbSegments )
- edgeLength /= nbSegments;
+ double ELen = 0;
+ if (( _hypLengthFromEdges ) || ( !_hypLengthFromEdges && !_hypMaxElementArea )) {
+ if ( nb1d > 0 )
+ ELen = fullLen / nb1d;
}
- if ( _hypMaxElementArea )
- {
+ if ( _hypMaxElementArea ) {
double maxArea = _hypMaxElementArea->GetMaxArea();
- edgeLength = sqrt(2. * maxArea/sqrt(3.0));
- }
- if ( edgeLength < DBL_MIN )
- edgeLength = occgeo.GetBoundingBox().Diam();
-
- //cout << " edgeLength = " << edgeLength << endl;
-
- netgen::mparam.maxh = edgeLength;
- netgen::mparam.quad = _hypQuadranglePreference ? 1 : 0;
- //ngMesh->SetGlobalH ( edgeLength );
-
- // -------------------------
- // Generate surface mesh
- // -------------------------
-
- char *optstr;
- int startWith = MESHCONST_MESHSURFACE;
- int endWith = MESHCONST_OPTSURFACE;
- int err = 1;
-
- try {
-#if (OCC_VERSION_MAJOR << 16 | OCC_VERSION_MINOR << 8 | OCC_VERSION_MAINTENANCE) > 0x060100
- OCC_CATCH_SIGNALS;
-#endif
- err = netgen::OCCGenerateMesh(occgeo, ngMesh, startWith, endWith, optstr);
- }
- catch (Standard_Failure& ex) {
- string comment = ex.DynamicType()->Name();
- if ( ex.GetMessageString() && strlen( ex.GetMessageString() )) {
- comment += ": ";
- comment += ex.GetMessageString();
- }
- error(COMPERR_OCC_EXCEPTION, comment);
- }
- catch (NgException exc) {
- error( SMESH_Comment("NgException: ") << exc.What() );
- }
- catch (...) {
- error(COMPERR_EXCEPTION,"Exception in netgen::OCCGenerateMesh()");
+ ELen = sqrt(2. * maxArea/sqrt(3.0));
}
+ GProp_GProps G;
+ BRepGProp::SurfaceProperties(F,G);
+ double anArea = G.Mass();
- // ----------------------------------------------------
- // Fill the SMESHDS with the generated nodes and faces
- // ----------------------------------------------------
-
- int nbNodes = ngMesh->GetNP();
- int nbFaces = ngMesh->GetNSE();
-
- int nbInputNodes = nodeVec.size();
- nodeVec.resize( nbNodes, 0 );
-
- // add nodes
- for ( int i = nbInputNodes + 1; i <= nbNodes; ++i )
+ const int hugeNb = numeric_limits<int>::max()/10;
+ if ( anArea / hugeNb > ELen*ELen )
{
- const MeshPoint& ngPoint = ngMesh->Point(i);
- SMDS_MeshNode * node = meshDS->AddNode(ngPoint.X(), ngPoint.Y(), ngPoint.Z());
- nodeVec[ i-1 ] = node;
+ SMESH_subMesh *sm = aMesh.GetSubMesh(F);
+ SMESH_ComputeErrorPtr& smError = sm->GetComputeError();
+ smError.reset( new SMESH_ComputeError(COMPERR_ALGO_FAILED,"Submesh can not be evaluated.\nToo small element length",this));
+ return false;
}
-
- // create faces
- bool reverse = ( aShape.Orientation() == TopAbs_REVERSED );
- for ( int i = 1; i <= nbFaces ; ++i )
- {
- const Element2d& elem = ngMesh->SurfaceElement(i);
- vector<const SMDS_MeshNode*> nodes( elem.GetNP() );
- for (int j=1; j <= elem.GetNP(); ++j)
- {
- int pind = elem.PNum(j);
- const SMDS_MeshNode* node = nodeVec.at(pind-1);
- if ( reverse )
- nodes[ nodes.size()-j ] = node;
- else
- nodes[ j-1 ] = node;
- if ( node->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
- {
- const PointGeomInfo& pgi = elem.GeomInfoPi(j);
- meshDS->SetNodeOnFace((SMDS_MeshNode*)node, faceID, pgi.u, pgi.v);
- }
- }
- SMDS_MeshFace* face = 0;
- if ( elem.GetType() == TRIG )
- face = helper.AddFace(nodes[0],nodes[1],nodes[2]);
- else
- face = helper.AddFace(nodes[0],nodes[1],nodes[2],nodes[3]);
+ int nbFaces = (int) ( anArea / ( ELen*ELen*sqrt(3.) / 4 ) );
+ int nbNodes = (int) ( ( nbFaces*3 - (nb1d-1)*2 ) / 6 + 1 );
+ std::vector<int> aVec(SMDSEntity_Last);
+ for(int i=SMDSEntity_Node; i<SMDSEntity_Last; i++) aVec[i]=0;
+ if( IsQuadratic ) {
+ aVec[SMDSEntity_Node] = nbNodes;
+ aVec[SMDSEntity_Quad_Triangle] = nbFaces;
}
+ else {
+ aVec[SMDSEntity_Node] = nbNodes;
+ aVec[SMDSEntity_Triangle] = nbFaces;
+ }
+ SMESH_subMesh *sm = aMesh.GetSubMesh(F);
+ aResMap.insert(std::make_pair(sm,aVec));
- Ng_DeleteMesh((nglib::Ng_Mesh*)ngMesh);
- Ng_Exit();
-
- NETGENPlugin_Mesher::RemoveTmpFiles();
-
- return !err;
+ return true;
}
